Combined pin tumbler and bit key lock



May 1, 1951 P. D. LONDO COMBINED PIN TUMBLER AND BIT KEY LOCK Filed Nov. 4, 1947 INVENTOR. PETER D. LO/VDO AGENT Patented May 1, 1951 PATENT OFFICE oomnmnnrmrnnnmn AND BIT KEY LOCK we m'mnamsan-niego, cane.

Applieation November 4, 194?;Se11ialiNo. 784,031

Myinventionrelat'es to a combinedpinttumbleit and-bit key locktand theflobj'ects of'imy, invention are";

' First, to provide a locktof" this class in which the incorporation of" a pin tumbler incombination with a conventionatbit" key. mortise. type lock greatly. increases thesecurity= of'housedoors or theliker Secondztoprovide a novelcooperativearrangementof a' conventional" pin tumblerl'ook with a conventionalvbit' keymortise tyne lock; v

Third; tot, provide a lock of" this class which:

may -be-readily installed; in connection, with doors having the conventional biti key: mortise type lock; v Fourth to. provide a lock oiifthi's class which;

employsa' conventional bit-"key which mayt be) f operated-by a pinv tumblercylinder at the; outer.

side of-the door for opening of theconventi'onal bit keymortise'tyhfiilock;

Fifth; m provide a lock ortms; classwhich. greatly improves the security; of; door. locks with a; minimufm'amount of cost;

be opened atronerside by a, conventiOnalbitliex andwhich may be'openedat' the other side there; of only by a key designed to operate .a pintumbler cylinder-cooperating with the bit key; andl Seventh; to provide alock ofthis CIESSWIiiCILiSJ very simple and: economical" of construction eff ficienirin-operation andwhich will not readily. deteriorateorget out of order.

With these and; other" objects. in view as appeanhe'reinaiten;,myinvention' consists oifcertain novel featuresof construction; combination andi bitiwkeyg." loch in connection therewith and showing: a portion broken away and in-sectiorr to amplitythe illustration Fig: zis a fragmentary sectional view: taken from the line-2- -2 of Fig; 1'1; Fig: 3315:; a: fragmentary- :sectional viewta-ken from the-dine- 3i-?:-:of" 1; Fig: is-a fragmentary seotiona-lfview taken from the-line 1-4,- of'Fi-g': 2: and: Fig; 5 is a sectionat" view taken from the line 5-5 of Fig. 1.

Similar-characters ofreference-refento similar:

partsxand'iportionsathroughoutethesseyerahviews:

athe appended claims; reference being teams. (01. "m -1st) The'bit' key mortise lock frame. I, bolt 2', pin tumbler cylinder frame 3, pin tumbler lock; 4; bitkey 5, clutch members Band T, clip 8, spring 9, escutcheon [I], door ll, bolt l2 constitute the principal parts 1 and portions 7 of my combination pin tumbler and bit key -lock..

The bit key mortise lock frame I is installed irrthedoor' H in the conventional manner. The conventional, slidably mounted locking bolt. 2 is operated in the conventional manner by the bit key- 5 and this bit key 5 at its extending end; is provided with flat portions 5a, as shown best in Figs; 2 and 4 of the drawing; Engaging these flat portions 5a of the bit key 5 is the clutchmember '1' which is a hollow cup shaped member having aconforming opening 1w therein engaging" the flat-"portions 5a as shown best in Fig. 4 of the drawing. This clutch member 1' is slidably mounted in the hollow cylindrical skirt portion 6a of theclutchmember ii and the clip 8 extends through elongated slotted portions 617. inthe hollow cylindrical portion 6a and also extends=throughthe side walls-"of the clutch member "l=;"a-ll-asshown*best inFig; 201? the drawing;

Thedoor H isprov'rded'. with a. bore portion H a' atone side oftheglockdrame I in which the clutch members 6*and 'l arevpositioned and the clutch-member B is? provided with an enlarged diameter flange portion 6-0- which is alternately engageable with the outer side of the door llv outward-ly of-"the bore portion Ha; and the inner, side of the pin tumbler cylinder frame 3jat' its recessed portion 3w. The spring 9' is a helical compression springpositioned in the clutch member" T surrounding the opening 1a therein and the bi-t key 5- when extended thereinto. The op;-

positeend" of this compression spring 53' engages thecentral 'portionof the clutch member, 6" at itspartially enclosed end in which holes are provided to--recei've extending pins 411 on the inner; end of the reciprocally. mounted pin. tumbler. lock: 4 This pin tumbler lock. 4) is. longitudinally sIldable-inithebore:portion 3'0 of the pin tumblercylindenframe 3", which is supported onthe. estcutcheon H1 atthe outer; side of the door Hf in. the-conventional manner. This escutcheon I 0; is secured in" connection with the door I lby means,

' of the bolt I2 havingits head portion. l2a at'the innersi'de of thedoor'l I; The operation; of my combined.- pin, tumbler and bit 'key' lock-is substantially; as follows:

When the-lock, as shown in Fig.2 of. the draw--- lng-is--'operatedby the bit keg 5, the..holt.2-'in lthe; bit-f keg mortise lock" frame. L is; extended. in. the; conventionah mannerg and," this bitz key 5.; is: can

3 tended from the inner side Nb of the door ll. When it is desired to lock the door H from the outside, the bit key 5 remains in the position as shown in Fig. 2 of the drawing. The operator places the proper key in the pin tumbler lock 4 and forces the same inwardly causing the pins 4a of the pin tumbler lock 4 to engage the openings lid in the clutch member 6. As the pin tumbler lock 4 is turned by its respective key, the clutch member 6 engaged with the clutch member I by means of the clip 8, rotates the clip 8 which in turn turns the bit key 5 forlocking or unlocking the door II. It will be noted that when the pin tumble r look at one side of said doorfclutch key is retracted from the pin tumbler lock 4,

that the pin tumbler lock 4 reciprocates inthe bore portion 30 of the pin tumbler cylinder frame 3, disengaging the pins la'of the pin tumbler lock 4 from the opening Ed in the clutch" member 6, thus permitting successive operation of the bit key 5 without interference of the pin tumbler lock 4. c

It will be here noted that the construction and operation of the clutch members 6 and 7 may be varied considerably in the cooperative relationship of the pin tumbler lock 4 withtne bit key 5 of the conventional bit key mortise lock. Also, it will be understood that various types of tumbler locks may be used as desired whether they I with said pintumbler lock, said clutch means be pin tumblers, wafer tumblers or other similar cylinder type locks.

Though I have shown and described a particular construction, combination andarrangement of parts and portions, I do not wish to be limited to this particular construction, combination and arrangement but desire to include in the scope of my invention, the construction, combination and arrangement substantially as set forth in the appended claims. 1

Having thus described my invention, what I claim asnew and desire to secure by Letters Patent is: a

1. In a combined pin tumbler and bitkey lock of the class described, a conventional bit key mortise type lock, a door in which said lock is positioned, a bit key in said mortise type look, a pin tumbler look at one side of said door, clutch means interconnecting said pin tumbler lock and said bit key whereby said bit key may be turned with said pin tumbler lock, said clutch means including a pair of interlocking telescopic members and a spring internally thereof, tending to force said telescopic members apart towardsaid tumbler lock and said bit key lock.

2. In a combined pin tumbler and bit key lock of the class described, a conventional bit key mortise type look, a door in which said lock is positioned, a bit key in said mortise type look,- a pin tumbler look at one side of said door, clutch means interconnecting said pin tumbler lock and said bit key whereby said bit key may be turned with said pin tumbler lock, said clutch means including a pair of interlocking telescopic members and a spring internally thereof, tending to force said telescopic members apart toward said tumbler lock and said bit key lock, said bit key having flat portions thereon engaging said clutch means.

3. In a combined pin tumbler and bit key lock of theclass described, a conventional bit key mortise type look, a door in which said lock is positioned, a bit key in saidmortise type lock,. a pin tumbler look at one side of said door, clutchmeans interconnecting said pin tumbler lock and said bit key whereby said bit key maybe turned with said pin tumbler lock, said clutch means tumbler cylinder, said means interconnecting said pin tumbler lock and said bit key whereby said bit key may be turned including a'pair' of interlocking telescopic members and a spring internally thereof, tending to force said telescopic members apart toward said tumbler lock and said bit key lock, said bit key having flat portions thereon engaging said clutch means, said pin tumbler lock having a reciprocally mounted cylinder therein adapted to be reciprocally engaged with said clutch means, one of said telescopic members engageable with said pin tumbler cylinder. v

5. In a combined pin tumbler and bit key lock of the class described, a conventional bit key mortise type look, a door in which said lock is positioned, a bit key in said mortise type look, a pin tumbler lock at one side of said door, clutch means interconnectingsaid pin tumbler lock and said bit key whereby said bit key may be turned with said pin tumbler lock, said clutch means including a pair of interlocking telescopic mem bers and a spring internally thereof, tending to force said telescopic members apart toward said tumbler lock and said bitkey lock, said bit key having fiat portions thereon engaging said clutchmeans, said pin tumbler lock having a reciprocally mounted cylinder therein adapted to be reciprocally engaged with said clutch means, one of said telescopic members engageable with said pin telescopic members engaging saidpin tumbler and said bit key respeciv ly. c 4

6. In a lockof the class described, the combination of a conventional bit key mortise type lock, a bit key in said lock adaptedto actuate the bolt thereof, a pin tumbler look at one side of said bit key mortise type lock and clutch means interconnecting said bit key and said pin tumbler lock whereby a key inserted in said pin tumbler lock may be operated to rotate said bit key in said bit .key mortise type lock, .said clutch means including apair of interlocking telescopic membersand a spring internallythereof, tending toforce said telescopicmembers apart toward said tumblerlock and said bit key lock.

7. In a combined cylinder and bit key lock of the class described, aconventional bit key mortise type lock, a door in which said lock is positioned,

a bit key in said mortise typelock, a cylinder lock at one side of said door, clutch means interconnecting said cylinder lock and said bit keytype lock, a door in which said lockxispositioned;

a bit key in said mortise type look, a cylinder lock PETER D. LONDO.

6 REFERENCES CITED The following references are of record in the file of this patent:

5 UNITED STATES PATENTS Number Name Date 946,523 Thomas Jan. 11, 1910 1,277,221 Keizer Aug. 2'7, 1918 1,360,289 Gunderson Nov. 30, 1920 10 1,505,865 I Costa Aug. 19, 1924 1,814,302 Falk July 14, 1931 

